Relative Motion

Car A in traveling on a straight road on a bearing of 300 degrees, at a constant speed on 80 km/h. at 10 am it is 15 Km due east of a second car B which is also traveling at a constant speed. assuming that car B can travel in any direction

The minimum speed to allow an intercept will involve B moving along a line that meets the course of A at right angles. Then you will have a 30, 60, 90 degree triangle, with one side 15km the one that B moves along 7.5 km and the third along which A mobves of length 7.5*sqrt(3).

The minimum speed to allow an intercept will involve B moving along a line that meets the course of A at right angles. Then you will have a 30, 60, 90 degree triangle, with one side 15km the one that B moves along 7.5 km and the third along which A mobves of length 7.5*sqrt(3).

RonL

I got but the books says the velocity is 40 km/h. Who's right me or them ???